mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-25 09:46:13 +08:00
347 lines
11 KiB
C
347 lines
11 KiB
C
//-----------------------------------------------------------------------------
|
|
//
|
|
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
|
|
// at your option, any later version. See the LICENSE.txt file for the text of
|
|
// the license.
|
|
//-----------------------------------------------------------------------------
|
|
// Low frequency Paradox tag commands
|
|
// FSK2a, rf/50, 96 bits (completely known)
|
|
//-----------------------------------------------------------------------------
|
|
#include "cmdlfparadox.h"
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <ctype.h>
|
|
|
|
#include "commonutil.h" // ARRAYLEN
|
|
#include "cmdparser.h" // command_t
|
|
#include "comms.h"
|
|
#include "ui.h"
|
|
#include "graph.h"
|
|
#include "cmddata.h"
|
|
#include "cmdlf.h"
|
|
#include "lfdemod.h"
|
|
#include "protocols.h" // t55xx defines
|
|
#include "cmdlft55xx.h" // clone..
|
|
#include "crc.h" // maxim
|
|
|
|
static int CmdHelp(const char *Cmd);
|
|
|
|
static int usage_lf_paradox_clone(void) {
|
|
PrintAndLogEx(NORMAL, "clone a Paradox tag to a T55x7 tag.");
|
|
PrintAndLogEx(NORMAL, "");
|
|
PrintAndLogEx(NORMAL, "Usage: lf paradox clone [h] [b <raw hex>]");
|
|
PrintAndLogEx(NORMAL, "Options:");
|
|
PrintAndLogEx(NORMAL, " h : this help");
|
|
PrintAndLogEx(NORMAL, " b <raw hex> : raw hex data. 12 bytes max");
|
|
PrintAndLogEx(NORMAL, "");
|
|
PrintAndLogEx(NORMAL, "Examples:");
|
|
PrintAndLogEx(NORMAL, _YELLOW_(" lf paradox clone b 0f55555695596a6a9999a59a"));
|
|
return PM3_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
static int usage_lf_paradox_sim(void) {
|
|
PrintAndLogEx(NORMAL, "Enables simulation of Paradox card with specified card number.");
|
|
PrintAndLogEx(NORMAL, "Simulation runs until the button is pressed or another USB command is issued.");
|
|
PrintAndLogEx(NORMAL, "The facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");
|
|
PrintAndLogEx(NORMAL, "");
|
|
PrintAndLogEx(NORMAL, "Usage: lf paradox sim [h] <Facility-Code> <Card-Number>");
|
|
PrintAndLogEx(NORMAL, "Options:");
|
|
PrintAndLogEx(NORMAL, " h : this help");
|
|
PrintAndLogEx(NORMAL, " <Facility-Code> : 8-bit value facility code");
|
|
PrintAndLogEx(NORMAL, " <Card Number> : 16-bit value card number");
|
|
PrintAndLogEx(NORMAL, "");
|
|
PrintAndLogEx(NORMAL, "Examples:");
|
|
PrintAndLogEx(NORMAL, _YELLOW_(" lf paradox sim 123 11223"));
|
|
return PM3_SUCCESS;
|
|
}
|
|
*/
|
|
|
|
const uint8_t paradox_lut[] = {
|
|
0xDB, 0xFC, 0x3F, 0xC5, 0x50, 0x14, 0x05, 0x47,
|
|
0x9F, 0xED, 0x7D, 0x59, 0x22, 0x84, 0x21, 0x4E,
|
|
0x39, 0x48, 0x12, 0x88, 0x53, 0xDE, 0xBB, 0xE4,
|
|
0xB4, 0x2D, 0x4D, 0x55, 0xCA, 0xBE, 0xA3, 0xE2
|
|
};
|
|
// FC:108, Card01827
|
|
// 00000000 01101100 00000111 00100011
|
|
// hex(0xED xor 0x7D xor 0x22 xor 0x84 xor 0xDE xor 0xBB xor 0xE4 xor 0x4D xor 0xA3 xor 0xE2 xor 0x47) 0xFC
|
|
|
|
#define PARADOX_PREAMBLE_LEN 8
|
|
|
|
static int CmdParadoxDemod(const char *Cmd) {
|
|
(void)Cmd; // Cmd is not used so far
|
|
return demodParadox();
|
|
}
|
|
|
|
//by marshmellow
|
|
//Paradox Prox demod - FSK2a RF/50 with preamble of 00001111 (then manchester encoded)
|
|
//print full Paradox Prox ID and some bit format details if found
|
|
|
|
int demodParadox(void) {
|
|
//raw fsk demod no manchester decoding no start bit finding just get binary from wave
|
|
uint8_t bits[MAX_GRAPH_TRACE_LEN] = {0};
|
|
size_t size = getFromGraphBuf(bits);
|
|
if (size == 0) {
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Paradox not enough samples");
|
|
return PM3_ESOFT;
|
|
}
|
|
|
|
int wave_idx = 0;
|
|
//get binary from fsk wave
|
|
int idx = detectParadox(bits, &size, &wave_idx);
|
|
if (idx < 0) {
|
|
if (idx == -1)
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Paradox not enough samples");
|
|
else if (idx == -2)
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Paradox just noise detected");
|
|
else if (idx == -3)
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Paradox problem during FSK demod");
|
|
else if (idx == -4)
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Paradox preamble not found");
|
|
else
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Paradox error demoding fsk %d", idx);
|
|
|
|
return PM3_ESOFT;
|
|
}
|
|
|
|
uint8_t *b = bits + idx;
|
|
uint8_t rawhex[12] = {0};
|
|
for (uint8_t i = 0, m = 0, p = 1; i < 96; i++) {
|
|
|
|
// convert hex
|
|
rawhex[m] <<= 1;
|
|
rawhex[m] |= (*b & 1);
|
|
b++;
|
|
|
|
if (p == 8) {
|
|
m++;
|
|
p = 1;
|
|
} else {
|
|
p++;
|
|
}
|
|
}
|
|
|
|
uint32_t hi2 = 0, hi = 0, lo = 0;
|
|
uint8_t error = 0;
|
|
|
|
// Remove manchester encoding from FSK bits, skip pre
|
|
for (uint8_t i = idx + PARADOX_PREAMBLE_LEN; i < (idx + 96 - PARADOX_PREAMBLE_LEN ); i += 2) {
|
|
|
|
// not manchester data
|
|
if (bits[i] == bits[i + 1]) {
|
|
PrintAndLogEx(WARNING, "Error Manchester at %u", i);
|
|
error++;
|
|
}
|
|
|
|
hi2 = (hi2 << 1) | (hi >> 31);
|
|
hi = (hi << 1) | (lo >> 31);
|
|
lo <<= 1;
|
|
|
|
if (bits[i] && !bits[i + 1]) {
|
|
lo |= 1; // 10
|
|
}
|
|
}
|
|
|
|
setDemodBuff(bits, size, idx);
|
|
setClockGrid(50, wave_idx + (idx * 50));
|
|
|
|
if (hi2 == 0 && hi == 0 && lo == 0) {
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Paradox no value found");
|
|
return PM3_ESOFT;
|
|
}
|
|
|
|
uint32_t fc = ((hi & 0x3) << 6) | (lo >> 26);
|
|
uint32_t cardnum = (lo >> 10) & 0xFFFF;
|
|
uint8_t chksum = (lo >> 2) & 0xFF;
|
|
|
|
|
|
// Calc CRC & Checksum
|
|
// 000088f0b - FC: 8 - Card: 36619 - Checksum: 05 - RAW: 0f55555559595aa559a5566a
|
|
// checksum?
|
|
uint8_t calc_chksum = 0x47;
|
|
uint8_t pos = 0;
|
|
for(uint8_t i = 0; i < 8; i++ ) {
|
|
|
|
uint8_t ice = rawhex[i+1];
|
|
for(uint8_t j = 0x80; j > 0; j >>= 2) {
|
|
|
|
if (ice & j) {
|
|
calc_chksum ^= paradox_lut[pos];
|
|
}
|
|
pos++;
|
|
}
|
|
}
|
|
|
|
uint32_t crc = CRC8Maxim(rawhex + 1, 8);
|
|
PrintAndLogEx(DEBUG, " FSK/MAN raw : %s", sprint_hex(rawhex, sizeof(rawhex)));
|
|
PrintAndLogEx(DEBUG, " raw : %s = (maxim crc8) %02x == %02x", sprint_hex(rawhex + 1, 8), crc, calc_chksum);
|
|
// PrintAndLogEx(DEBUG, " OTHER sample CRC-8/MAXIM : 55 55 69 A5 55 6A 59 5A = FC");
|
|
|
|
uint32_t rawLo = bytebits_to_byte(bits + idx + 64, 32);
|
|
uint32_t rawHi = bytebits_to_byte(bits + idx + 32, 32);
|
|
uint32_t rawHi2 = bytebits_to_byte(bits + idx, 32);
|
|
|
|
PrintAndLogEx(INFO, "Paradox - ID: " _GREEN_("%x%08x") " FC: " _GREEN_("%d") " Card: " _GREEN_("%d") ", Checksum: %02x, Raw: %08x%08x%08x",
|
|
hi >> 10,
|
|
(hi & 0x3) << 26 | (lo >> 10),
|
|
fc,
|
|
cardnum,
|
|
chksum,
|
|
rawHi2,
|
|
rawHi,
|
|
rawLo
|
|
);
|
|
|
|
PrintAndLogEx(DEBUG, "DEBUG: Paradox idx: %d, len: %zu, Printing Demod Buffer:", idx, size);
|
|
if (g_debugMode)
|
|
printDemodBuff();
|
|
|
|
return PM3_SUCCESS;
|
|
}
|
|
//by marshmellow
|
|
//see ASKDemod for what args are accepted
|
|
static int CmdParadoxRead(const char *Cmd) {
|
|
lf_read(false, 10000);
|
|
return CmdParadoxDemod(Cmd);
|
|
}
|
|
|
|
static int CmdParadoxClone(const char *Cmd) {
|
|
|
|
uint32_t blocks[4];
|
|
bool errors = false;
|
|
uint8_t cmdp = 0;
|
|
int datalen = 0;
|
|
|
|
while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
|
|
switch (tolower(param_getchar(Cmd, cmdp))) {
|
|
case 'h':
|
|
return usage_lf_paradox_clone();
|
|
case 'b': {
|
|
// skip first block, 3*4 =12 bytes left
|
|
uint8_t rawhex[12] = {0};
|
|
int res = param_gethex_to_eol(Cmd, cmdp + 1, rawhex, sizeof(rawhex), &datalen);
|
|
if (res != 0)
|
|
errors = true;
|
|
|
|
for (uint8_t i = 1; i < ARRAYLEN(blocks); i++) {
|
|
blocks[i] = bytes_to_num(rawhex + ((i - 1) * 4), sizeof(uint32_t));
|
|
}
|
|
cmdp += 2;
|
|
break;
|
|
}
|
|
default:
|
|
PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp));
|
|
errors = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (errors || cmdp == 0) return usage_lf_paradox_clone();
|
|
|
|
//Securakey - compat mode, ASK/Man, data rate 40, 3 data blocks
|
|
blocks[0] = T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3 << T55x7_MAXBLOCK_SHIFT;
|
|
|
|
PrintAndLogEx(INFO, "Preparing to clone Paradox to T55x7 with raw hex");
|
|
print_blocks(blocks, ARRAYLEN(blocks));
|
|
|
|
int res = clone_t55xx_tag(blocks, ARRAYLEN(blocks));
|
|
PrintAndLogEx(SUCCESS, "Done");
|
|
PrintAndLogEx(HINT, "Hint: try " _YELLOW_("`lf paradox read`") " to verify");
|
|
return res;
|
|
}
|
|
|
|
static int CmdParadoxSim(const char *Cmd) {
|
|
PrintAndLogEx(INFO, " To be implemented, feel free to contribute!");
|
|
return PM3_SUCCESS;
|
|
}
|
|
/*
|
|
char cmdp = tolower(param_getchar(Cmd, 0));
|
|
if (strlen(Cmd) == 0 || cmdp == 'h') return usage_lf_paradox_sim();
|
|
|
|
uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0;
|
|
|
|
uint8_t bs[96];
|
|
memset(bs, 0x00, sizeof(bs));
|
|
|
|
// Paradox uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 1 FSK2a
|
|
uint8_t clk = 50, invert = 1, high = 10, low = 8;
|
|
|
|
if (sscanf(Cmd, "%u %u", &fc, &cn) != 2) return usage_lf_paradox_sim();
|
|
|
|
facilitycode = (fc & 0x000000FF);
|
|
cardnumber = (cn & 0x0000FFFF);
|
|
|
|
// if ( GetParadoxBits(facilitycode, cardnumber, bs) != PM3_SUCCESS) {
|
|
// PrintAndLogEx(ERR, "Error with tag bitstream generation.");
|
|
// return 1;
|
|
// }
|
|
|
|
PrintAndLogEx(NORMAL, "Simulating Paradox - Facility Code: %u, CardNumber: %u", facilitycode, cardnumber);
|
|
|
|
lf_fsksim_t *payload = calloc(1, sizeof(lf_fsksim_t) + sizeof(bs));
|
|
payload->fchigh = high;
|
|
payload->fclow = low;
|
|
payload->separator = invert;
|
|
payload->clock = clk;
|
|
memcpy(payload->data, bs, sizeof(bs));
|
|
|
|
clearCommandBuffer();
|
|
SendCommandNG(CMD_LF_FSK_SIMULATE, (uint8_t *)payload, sizeof(lf_fsksim_t) + sizeof(bs));
|
|
free(payload);
|
|
|
|
PacketResponseNG resp;
|
|
WaitForResponse(CMD_LF_FSK_SIMULATE, &resp);
|
|
|
|
PrintAndLogEx(INFO, "Done");
|
|
if (resp.status != PM3_EOPABORTED)
|
|
return resp.status;
|
|
return PM3_SUCCESS;
|
|
}
|
|
*/
|
|
static command_t CommandTable[] = {
|
|
{"help", CmdHelp, AlwaysAvailable, "This help"},
|
|
{"demod", CmdParadoxDemod, AlwaysAvailable, "Demodulate a Paradox FSK tag from the GraphBuffer"},
|
|
{"read", CmdParadoxRead, IfPm3Lf, "Attempt to read and Extract tag data from the antenna"},
|
|
{"clone", CmdParadoxClone, IfPm3Lf, "clone paradox tag to T55x7"},
|
|
{"sim", CmdParadoxSim, IfPm3Lf, "simulate paradox tag"},
|
|
{NULL, NULL, NULL, NULL}
|
|
};
|
|
|
|
static int CmdHelp(const char *Cmd) {
|
|
(void)Cmd; // Cmd is not used so far
|
|
CmdsHelp(CommandTable);
|
|
return PM3_SUCCESS;
|
|
}
|
|
|
|
int CmdLFParadox(const char *Cmd) {
|
|
clearCommandBuffer();
|
|
return CmdsParse(CommandTable, Cmd);
|
|
}
|
|
|
|
// loop to get raw paradox waveform then FSK demodulate the TAG ID from it
|
|
int detectParadox(uint8_t *dest, size_t *size, int *wave_start_idx) {
|
|
//make sure buffer has data
|
|
if (*size < 96 * 50) return -1;
|
|
|
|
if (getSignalProperties()->isnoise) return -2;
|
|
|
|
// FSK demodulator
|
|
*size = fskdemod(dest, *size, 50, 1, 10, 8, wave_start_idx); // paradox fsk2a
|
|
|
|
//did we get a good demod?
|
|
if (*size < 96) return -3;
|
|
|
|
// 00001111 bit pattern represent start of frame, 01 pattern represents a 0 and 10 represents a 1
|
|
size_t idx = 0;
|
|
uint8_t preamble[] = {0, 0, 0, 0, 1, 1, 1, 1};
|
|
if (!preambleSearch(dest, preamble, sizeof(preamble), size, &idx))
|
|
return -4; //preamble not found
|
|
|
|
return (int)idx;
|
|
}
|
|
|
|
|